jj-duplicate
creates copies of revisions
TLDR
Duplicate current revision
$ jj duplicate
Duplicate specific revision$ jj duplicate [revision]
Duplicate multiple revisions$ jj duplicate [rev1] [rev2]
SYNOPSIS
jj duplicate [revisions...]
DESCRIPTION
jj duplicate creates copies of revisions. The duplicated commits have identical content but new change IDs. Useful for creating variations or preserving commits before modification.